Power can be dangerous.
Warn about or flaunt that, or just show off your affinity for technology.
3/32" thick, 3/4" tall, with a flat back to attach to pins, earring bases, or anything else you want to glue or tape it to.
Same front and back, so it can be hung from rear view mirrors, zippers, keychains, etc. as well as be worn as a pendant. Hardware not included.